dfll_set_frequency_request(9)

dfll_set_frequency_request(9)

okay so this is from the Kernel API Manual and it's literally all about starting the frequency change operation. bestie, we're getting into the clock-y weeds today 💅

---

✨ NAME ✨

dfll_set_frequency_request — start the frequency change operation

---

✨ SYNOPSIS ✨

void dfll_set_frequency_request (struct tegra_dfll *td , struct
       dfll_rate_req *req );

---

✨ ARGUMENTS ✨

• td — the DFLL instance (your main character)
• req — the rate request structure (the vibe you're requesting)

---

✨ DESCRIPTION ✨

So like, you're telling the DFLL to try to change its output frequency to the frequency represented by req. That's the whole assignment. 📋

🚨 important vibe check: the DFLL must be in closed-loop mode. no closed-loop, no frequency change. that's the rule, periodt.

---

✨ SEE ALSO ✨

Kernel file ./drivers/clk/tegra/clk-dfll.c and literally all of these besties:

• enum dfll_ctrl_mode(9)
• enum dfll_tune_range(9)
• struct dfll_rate_req(9)
• dfll_is_running(9)
• tegra_dfll_runtime_resume(9)
• tegra_dfll_runtime_suspend(9)
• dfll_tune_low(9)
• dfll_scale_dvco_rate(9)
• dfll_set_mode(9)
• dfll_i2c_set_output_enabled(9)
• dfll_pwm_set_output_enabled(9)
• dfll_set_force_output_value(9)
• dfll_set_force_output_enabled(9)
• dfll_force_output(9)
• dfll_load_i2c_lut(9)
• dfll_init_i2c_if(9)
• dfll_init_out_if(9)
• find_lut_index_for_rate(9)
• dfll_calculate_rate_request(9)
• dfll_request_rate(9)
• dfll_disable(9)
• dfll_enable(9)
• dfll_set_open_loop_config(9)
• dfll_lock(9)
• dfll_unlock(9)
• dfll_register_clk(9)
• dfll_unregister_clk(9)
• dfll_calc_monitored_rate(9)
• dfll_read_monitor_rate(9)
• dfll_set_default_params(9)
• dfll_init_clks(9)
• dfll_init(9)
• tegra_dfll_suspend(9)
• tegra_dfll_resume(9)
• dfll_build_i2c_lut(9)
• read_dt_param(9)
• dfll_fetch_i2c_params(9)
• dfll_fetch_common_params(9)
• tegra_dfll_register(9)
• tegra_dfll_unregister(9)

---

this page came from ./drivers/clk/tegra, landed in October 2026, and it's literally titled dfll_set_frequency_request(9) — slay. 🫶✨